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Home >> Chevrolet >> 2005 >> TrailBlazer 2WD V8-5.3L VIN M >> Repair and Diagnosis >> Powertrain Management >> Tune-up and Engine Performance Checks >> Compression Check >> Specifications

Compression Check: Specifications

Non-DoD
^ Compression Ratio 9.95:1
With the engine running and the cylinder NOT in DoD mode, the compression gage reading should increase quickly to greater than 345 kPa (50 psi).

DoD Mode
With the engine running and the cylinder in DoD mode, the compression reading should be less than 172 kPa (25 psi).
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